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Dec. 27' .1927. 1,654,441

O. WERNECKE RESETTING MECHANISM FOR CALCULATING MACHINES Filed May 4, 1925 Wa on/z. 6 1/- Patented Dec. 27, 192 7.

UNITED STATES 1,654,441 PATENT OFFICE.-

orro wmmncxn, or'BnUNswIcx, GERMANY,'ASSIGNOR'TO GRIMME, NA'rALIs a 00., axrmnensnnnscnarr, mmnnsonwnre, GERMANY, or mwnswtrcx, GERMANY, A

CORPORATION OF GERMANY.

nnsnr'rme MECHANISM ron CALCULATING Mnonmns.

Application filed May 4, 1925, serial No. 27,884, and in (lei-many May 18, v19534.

My invention relates to improvements in resetting mechanisms for calculating machines, and more particularly in resetting mechanisms in which the resetting shaft is 5 adapted to be operated by means of atoothed sector meshing with a gear-wheel keyedjo the resetting shaft. In machines of this type. the sector or the operating lever connected therewith is provided with a spring tend- 10 ing to retract the same after operation into initial position and into contact with a fixed lug. In machines now in use an objection-.

able noise is caused by thstriking of said lever or sector on its lug. The object of the present invention is to so' construct the retracting means that the heavy blow of the sector on the log is avoided, and with this object in view I provide a spring actuated L stop member for the said sector, which stop member is held by spring action in initial position insuring the correct position of the sector andthe resetting mechanism.

For the purpose of explaining the invention an example embodying the same has 25. been shown in the accompanying drawing, in which the same reference characters have been used in all the views to indicate corresponding parts. In said drawing,

- Fig. 1, is a sectional view of a part of the registering mechanism of a calculating machine, and the resetting mechanism ,thereof embodying my improvements,

i 'Fig. 2,, is a sectionalview takenon the line 2-2 of Fig. 1, and looking in the direction of the arrows, and

Fig. 3, is a detail view showing a part of the resetting mechanism.

In the example shown in the drawing the registering mechanism comprises numeral 40 wheels 0 loosely supported .on a shaft e rotatably mounted in suitable bearings-of the side walls\k of thecarriage of a calculating machine, one of the said bearings being shown at 7. Each of thenumeral wheels ois fastened to a gear wheel'o, and the said gear wheels are adapted to be rotated by the setting mechanism in a manner known in the art.

In a longitudinal groove e of the shaft e a I rail 1) is axially slidable. Said rail p is w provided with a plurality of lugs or noses v 1), one for each of the numeral wheels. The lugs or noses are adapted for cooperation with pins 1) secured to the numeral wheels 0. Normally the noses p are out of position for engagement with the pins p, but they are adapted to be shifted intoengagement therewlth by axially shifting the rail 39 towards the numeral wheels v0, that is to say, towards the left in Fig. 1.' On the shaft e a gear wheel f is loosely mounted which 18 formed on its inner end with a clutch tooth 7 (Figure 3) cooperating with a tooth t of a clutch member t fixed to the shaft 0. The'right hand end face of the gear wheel 7 1S engaged by a coiled spring g bearing on a nose p formed on the right hand end of the ra l p. Thus the spring 9 tends to shift the rail p to theright and to normally main tam the noses p out of-en'gagement wit the pins 9 .of the nume'ralwheels o, and to hold the coupling teeth 7. and t in coupling engagement. The bearing sleeve 1' of the shaft 6 is provided on its inner face with a notch f havin a beveled face 1- and located in position to orm an abutment for the nose pf. For resetting the registering mechan1 sm the shaft 6 is turned by means of mechanism engaging the gear wheel 7, as will be described hereinafter. By the said mecha--v nism the gear wheel 7 is turned in the directlon ef the arrow y shown in Fig. 3, and, by reason ofthe engagement of the tooth f With the tooth t of the clutch member If the shaft 6 is turned in the same direction. This w1ll cause the nose 72 of the rail 19 to ride up the beveled face 1' of'the notch e onto theinner face of the bearing sleeve 1' so that the teeth f and t andthe rail p are shifted to the left and in the direction of the arrow a (Figure 1) and againSt the action of the spring (1. Thus the noses p are shifted int-o positlons for engagement with the pins p of the numeral wheels 0. When the shaft e is turned further the noses p 'engage "the pins p? so as to return the numeral wheels 0 to zero positions. After the shaft 0 is turned through an angle of 360 the nose 1: is caused by the spring I to re-enter the notch 1' The operating mechanism of the gear wheel 7 is then released and automatically returned into initial position. Therefore thegear wheel 7 is turned in a direction opposite to the arrow y, and its tooth f rests on the end face of the sleeve t, the spring g permitting the same to yield to the right. In the meantime the movement of shaft -e is arrested by the nose p engaging in the notch 1 At the end of the said return once has been made to a movement the tooth f engages at the rear of the tooth t For imparting resetting movement to the shaft 0 a sector 0 isprovided which is operatively connected with the gear wheel f through an intermediate gear wheel 03, and which is secured to a shaft 5 carrying a crank (1. Thus when the crank a is turned through a certain angle the shaft e is turned W by the sector 0 a dthe gear wheels d and f through an ange of 360. The shaft Z) is Journa'led in a sleeve 3, and on and surroundmg the said sleeve is a coiled spring h having elongated tines or ends 71, and b (Fig: 36 we 2) in engagement with pins 2' and m secured, respectively, to the sector cand the wall In. Thus when the crank a is turned inthe direction of the arrow or shown in \Fig. .2 the end h of the spring is arrested 2 by the pin m fixed to the wall is, and the pin 2' fixed to the sector 0 displaces the end h. When the crank dis-released the end it of the spring returns the sector. a and the parts connected therewith into initial positions 25 and atithe end of such return movement oi the sector 0 the pin irstrikes the arm or tine it so that the impact is absorbed by the said arm or tine b the gear wheel 7* being slightly turned relatively to the clutch member t.

80 Finally the pin 2 and the gear wheel f which are thrown by impact beyond the normal position are returned to normal position by the arm or tine it of the spring it,

While in describing the invention referarticnlar exam is embodyingthe same, I Wish it to be un er stood that my invention is not limited to the construction'shown in the drawing, and that various changes may be made in the 49 general arrangement of the apparatus and the construction of its parts without departmg from the invention. claim: 1 In a resetting mocha for a palm my hand meager lating machine or the like embodyin arotatable operating part and a part with respectwto which said operating part rotates, a member carried by the first-named part and extending toward the second-named part, a member carried by the second-named part and extending toward the first-named part, and a spring carried by one of saidparts having a pair of substantially parallel arms straddling said members.

2-. in a resettingmechanism for calculating machines embodying a rotatable operat= ing part and a part with respect to which said operating part is rotatable, each of said parts having a member secured thereto eccentric to the axis of rotation of the first named part, said members extending toward one another and, when said parts are in nor mal position, lying in radial alinement with the axis of rotation of said operating part, and a spring carried by one of said parts and igaving a pair of arms straddling said mem ers.-

" 3. In a resetting mechanism for a calculating machine or the like, an operating means, a part with respect to which said 0 crating means moves, a pin carried by sai operating means, a pin carried by said resilient means having opposite y movable arms between which said pins are disposed for ,coaction with said arms,

4. in a resetting mechanism for a calculating machine or the like, an operating means, a drive member associatedtherewith, a support in which said means is mounted for rotation, a coil spring surrounding said operating means between said drive member and support, a pin carried by said drive member, and a pin carried by said su port, said spring having arms between whic said pins are disposed.

In testimony whereof I have hereunto set o'r'ro wnanr'orm.

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